From 3eaefc7d26b8412b9f4bd5e638fef36b09f5aeff Mon Sep 17 00:00:00 2001 From: Michael Zhang Date: Sun, 5 Mar 2017 23:58:08 -0800 Subject: [PATCH 01/14] Added Hex QR --- count.py | 3 +- qrt/description.md | 1 + qrt/flag.png | Bin 0 -> 16213 bytes qrt/grader.py | 22 ++++ qrt/problem.yml | 5 + qrt/qrt.py | 311 +++++++++++++++++++++++++++++++++++++++++++++ qrt/qrt.pyc | Bin 0 -> 8304 bytes qrt/server.py | 30 +++++ 8 files changed, 371 insertions(+), 1 deletion(-) create mode 100644 qrt/description.md create mode 100644 qrt/flag.png create mode 100644 qrt/grader.py create mode 100644 qrt/problem.yml create mode 100644 qrt/qrt.py create mode 100644 qrt/qrt.pyc create mode 100644 qrt/server.py diff --git a/count.py b/count.py index 9623aba..bf76c05 100644 --- a/count.py +++ b/count.py @@ -20,6 +20,7 @@ for problem_name in problem_names: pass # print traceback.format_exc() +problems.sort(key=lambda p: p.get("value"), reverse=True) print "Grand Total: %d" % len(problems) print "Category Breakdown:" @@ -29,4 +30,4 @@ for category, count in categories: print " %s: %s" % (category, count) for problem in problems: if problem.get("category") != category: continue - print " %s" % problem.get("title") + print " %s [%s]" % (problem.get("title"), problem.get("value")) diff --git a/qrt/description.md b/qrt/description.md new file mode 100644 index 0000000..8872c46 --- /dev/null +++ b/qrt/description.md @@ -0,0 +1 @@ +I've stumbled upon a very strange [QR code](${flag_png})... seems like it was generated with [this generator](http://hexqr.web.easyctf.com). 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b/qrt/qrt.py new file mode 100644 index 0000000..d72640e --- /dev/null +++ b/qrt/qrt.py @@ -0,0 +1,311 @@ +from PIL import Image, ImageDraw +from math import ceil, sqrt + +ALTCONST = sqrt(3) / 2.0 +ISIZE = 784.0 +IMARGIN = 22.0 + +def empty_hex(size): + c = 0 + points = [] + for i in range(2, size * 2 + 2, 2): + points.append([0] * i) + middle = [] + for i in range(size * 2 - 1): + row = [0] * (size * 2) + middle.append(row) + epoints = list(row[:] for row in points[::-1]) + return points + middle + epoints + +def intify(points): + return map(lambda c: (int(c[0]), int(c[1])), points) + +def draw_triangle(im, points, cell, size): + draw = ImageDraw.Draw(im) + # draw.polygon(points, outline=(0, 0, 0)) + if cell: + draw.polygon(intify(points), fill=(0, 0, 0)) + return im + +def getsection(i, size): + return 0 if i <= size - 1 else (1 if i < 3 * size - 1 else 2) + +def getspace(size): + return max(0, sum(len(filter(lambda a: a == 0, b)) for b in empty_hex(size)) - 2) + +def generate(string, debug=False): + size = 0 + binstring = bin(int(string.encode("hex"), 16)).strip("0b") + while size < 2 or getspace(size + 1) < len(binstring): + size += 1 + n = getspace(size) + # print size, len(binstring) + if debug: print "SIZE", size, " n =", n + im = Image.new("RGB", (int(ISIZE), int(ISIZE)), "white") + pattern = empty_hex(size) + # print len(binstring) + # print sum(len(i) for i in pattern) + pattern[0][len(string) % 2] = 1 + curr = (1, 1 + len(string) % 2, 3 - len(string) % 2) + # 0 1 + # 3 2 + for c in range(n): # range(len(binstring)): + i, j, d = curr + row = pattern[i] + if c < len(binstring): + b = int(binstring[c]) + pattern[i][j] = b + if c % 2 == 0: + pattern[i][j] ^= 1 + + section = getsection(i, size) + leftfacing = [j % 2 == 0, j % 2 != (i - size) % 2, j % 2 == 0][section] + if debug: print "c =", c, ", i =", i, ", j =", j, ", d =", d, ", s =", section, ", l =", leftfacing + if section == 0: + if getsection(i + 1, size) == 0: + if leftfacing: + if d == 0: + if j == 0: + curr = i + 1, j, (d + 2) % 4 + else: + curr = i - 1, j - 1, d + elif d == 1 or d == 2: + curr = i, j + 1, d + elif d == 3: + curr = i + 1, j + 1, d + else: + if d == 0: + curr = i, j - 1, d + elif d == 1: + if j == len(row) - 1: + curr = i + 1, j + 2, (d + 2) % 4 + else: + curr = i - 1, j - 1, d + elif d == 2: + curr = i + 1, j + 1, d + elif d == 3: + curr = i, j - 1, d + elif getsection(i + 1, size) == 1: + if leftfacing: + if d == 0: + if j == 0: + curr = i + 1, j, (d + 2) % 4 + else: + curr = i - 1, j - 1, d + elif d == 1 or d == 2: + curr = i, j + 1, d + elif d == 3: + curr = i + 1, j, d + else: + if d == 0: + curr = i, j - 1, d + elif d == 1: + if j == len(row) - 1: + curr = i + 1, j, (d + 2) % 4 + else: + curr = i - 1, j - 1, d + elif d == 2: + curr = i + 1, j, d + elif d == 3: + curr = i, j - 1, d + elif section == 1: + if getsection(i - 1, size) == 0: + if leftfacing: + if j == len(row) - 1: + if d == 1: + curr = i + 2, j, (d + 2) % 4 + elif d == 2: + curr = i + 2, j, (d + 2) % 4 + elif d == 3: + curr = i + 1, j, d + else: + if d == 0: + curr = i - 1, j, d + elif d == 1 or d == 2: + curr = i, j + 1, d + elif d == 3: + curr = i + 1, j, d + else: + if j == 0: + if d == 0: + curr = i + 2, j, (d + 2) % 4 + elif d == 2: + curr = i + 1, j, d + elif d == 3: + curr = i + 2, j, (d + 2) % 4 + else: + if d == 0 or d == 3: + curr = i, j - 1, d + elif d == 1: + curr = i - 1, j, d + elif d == 2: + curr = i + 1, j, d + elif getsection(i - 1, size) == 1: + if getsection(i + 1, size) == 1: + if leftfacing: + if j == len(row) - 1: + if d == 0: + curr = i - 1, j, d + elif d == 1: + curr = i + 2, j, (d + 2) % 4 + elif d == 2: + curr = i + 2, j, (d + 2) % 4 + elif d == 3: + curr = i + 1, j, d + else: + if d == 0: + curr = i - 1, j, d + elif d == 1 or d == 2: + curr = i, j + 1, d + elif d == 3: + curr = i + 1, j, d + else: + if j == 0: + if d == 0: + curr = i + 2, j, (d + 2) % 4 + elif d == 1: + curr = i - 1, j, d + elif d == 2: + curr = i + 1, j, d + elif d == 3: + curr = i + 2, j, (d + 2) % 4 + else: + if d == 0 or d == 3: + curr = i, j - 1, d + elif d == 1: + curr = i - 1, j, d + elif d == 2: + curr = i + 1, j, d + elif getsection(i + 1, size) == 2: + if leftfacing: + if j == len(row) - 1: + if d == 0: + curr = i - 1, j, d + elif d == 2: + curr = i + 1, j, (d + 2) % 4 + else: + if d == 0: + curr = i - 1, j, d + elif d == 1: + curr = i, j + 1, d + elif d == 2: + curr = i, j + 1, d + elif d == 3: + curr = i + 1, j, d + else: + if d == 0: + curr = i, j - 1, d + elif d == 1: + curr = i - 1, j, d + elif d == 2: + curr = i + 1, j, d + elif d == 3: + if j == 0: + curr = i + 1, j, (d + 2) % 4 + else: + curr = i, j - 1, d + elif section == 2: + if getsection(i - 1, size) == 1: + if leftfacing: + if d == 0: + curr = i - 1, j, d + elif d == 1: + curr = i, j + 1, d + elif d == 2: + curr = i, j + 1, d + elif d == 3: + if j == 0: + curr = i + 1, j, (d + 2) % 4 + else: + curr = i + 1, j - 1, d + else: + if d == 0 or d == 3: + curr = i, j - 1, d + elif d == 1: + curr = i - 1, j, d + elif d == 2: + if j == len(row) - 1: + curr = i + 1, j - 2, (d + 2) % 4 + else: + curr = i + 1, j - 1, d + elif getsection(i - 1, size) == 2: + if leftfacing: + if d == 0: + curr = i - 1, j + 1, d + elif d == 1 or d == 2: + curr = i, j + 1, d + elif d == 3: + if j == 0: + curr = i + 1, j, (d + 2) % 4 + else: + curr = i + 1, j - 1, d + else: + if j == len(row) - 1: + if d == 0: + curr = i, j - 1, d + elif d == 1: + curr = i - 1, j + 1, d + elif d == 2: + curr = i + 1, j - 2, (d + 2) % 4 + else: + if d == 0 or d == 3: + curr = i, j - 1, d + elif d == 1: + curr = i - 1, j + 1, d + elif d == 2: + curr = i + 1, j - 1, d + # for i in range(len(pattern)): + # for j in range(len(pattern[i])): + # section = 0 if i <= size - 1 else (1 if i < 3 * size - 1 else 2) + # leftfacing = [j % 2 == 0, j % 2 != (i - size) % 2, j % 2 == 0][section] + # if not leftfacing: + # print j, + # print + sidelen = (ISIZE - IMARGIN * 2) / (2.0 * size) + altitude = sidelen * ALTCONST + # print sidelen, altitude + for i in range(len(pattern)): + section = getsection(i, size) + row = pattern[i] + rowleft = (ISIZE / 2) - (altitude * len(row) / 2) + if section % 2 == 0: + evenrow = i % 2 == 0 + for j in range(len(row)): + cell = row[j] + top = ceil(i / 2.0) * sidelen - (0.5 * sidelen if not evenrow else 0) + IMARGIN + bottom = top + sidelen + if j % 2 == 0: + points = [ + (rowleft + altitude * j, top + sidelen / 2), + (rowleft + altitude * (j + 1), top), (rowleft + altitude * (j + 1), bottom) + ] + else: + points = [ + (rowleft + altitude * (j + 1), top + sidelen / 2), + (rowleft + altitude * j, top), (rowleft + altitude * j, bottom) + ] + draw_triangle(im, points, cell, size) + else: + evenrow = (i - size) % 2 == 1 + for j in range(len(row)): + cell = row[j] + top = ceil(i / 2.0) * sidelen - (0.5 * sidelen if i % 2 == 1 else 0) + IMARGIN + bottom = top + sidelen + if j % 2 == (i - size) % 2: + points = [ + (rowleft + altitude * (j + 1), top + sidelen / 2), + (rowleft + altitude * j, top), (rowleft + altitude * j, bottom) + ] + else: + points = [ + (rowleft + altitude * j, top + sidelen / 2), + (rowleft + altitude * (j + 1), top), (rowleft + altitude * (j + 1), bottom) + ] + draw_triangle(im, points, cell, size) + return im + +# im = generate("easyctf{are_triangles_more_secure_than_squares?}") +# im.save("flag.png") + +# for i in range(40, 60): +# generate("A" * i, "/tmp/%d.png" % i) \ No newline at end of file diff --git a/qrt/qrt.pyc b/qrt/qrt.pyc new file mode 100644 index 0000000000000000000000000000000000000000..02316a0bdc10cdf86b9e4a0650bc07903982a15d GIT binary patch literal 8304 zcmb_hTWlOx89uW&+v~M=oou}8G)a?QR98*yRE46Vq*s@%rPfsIwyE5Pu-O?q>+Hq5 zGj1HZD^;XLm5Pw6qKa0~rwSgpyc87)!3*L6iH9P1qN*woLa2f#K&k|Y@_qk5J3E^l zrxmfiXXeZ~|K}ft)cGj%U=K!(xG5+R>+DqcH z+^B3g-bBB))Tvz5&IFpOPOa{-;OYwd(nbQ(s(aRks^X({mRe>$EnVDk@IJy;Swq7q>dCb9JZT zE+QZ-3tN|52JhsC({y&WI`_;_Bz2|yNK>Iix>IQ)(zL6xwdFKz32eRQdh-mLhPn0? 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zor>q&M3BFr7x4Ax7V9=^+RDUICXae1UbJqD@3*p6+S+I3@Lecp6=GTIZYyOzV`Z#4 zaAfd*Bz6$rj%HCi9Lvak*17?08H;5uf^IILBd_ut655pTA3>c(=~OoB+Dc8wV%o|& zH4qEyET7CBC1JpSEI_C7259w}7GE!VX@6fU@9a4oLPkFv_U-TcNNM_9wEkwFgY}!n zXRUN>PJDg{{?36rZ5>C+q4mzhVQW5iFqW6ryU<#M{M!<9)`{44mdmdq{D-Dd0gO7pDS-UfwxZ%;n7tk)|W3tP>NmHB_kxAVe7aQTEJV^GGbjBOcxU#Qewr+hC-WTbJ*a4XL`gQS+)wSQ~lFgw|3 j+1qvJ9_F;m31QZnjpdLZsn|qjB0e#O63={WavAG?ozKhD literal 0 HcmV?d00001 diff --git a/qrt/server.py b/qrt/server.py new file mode 100644 index 0000000..51c70de --- /dev/null +++ b/qrt/server.py @@ -0,0 +1,30 @@ +from flask import Flask, request +from qrt import generate +from base64 import b64encode +from binascii import b2a_base64 +from cStringIO import StringIO +from traceback import format_exc + +app = Flask(__name__) + +@app.route("/", methods=["GET", "POST"]) +def index(): + try: + html = "hex qr
enter a string:
" + if request.method == "POST": + if not request.form.get("text"): + html %= "" + html += "

empty

" + else: + html %= request.form["text"] + im = generate(request.form["text"]) + buf = StringIO() + im.save(buf, format="JPEG") + html += "" % b2a_base64(buf.getvalue()) + else: + html %= "" + return html + except: + return "" % format_exc() + +app.run(host="0.0.0.0", port=5000) \ No newline at end of file From 9aadd225e2304f2a2b246b7ae62142e9481ef2df Mon Sep 17 00:00:00 2001 From: Michael Zhang Date: Sun, 5 Mar 2017 23:58:29 -0800 Subject: [PATCH 02/14] Ignore *.pyc --- .gitignore | 1 + 1 file changed, 1 insertion(+) create mode 100644 .gitignore diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..7e99e36 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +*.pyc \ No newline at end of file From 71a870991096ab2d32d980df883374291fb218f2 Mon Sep 17 00:00:00 2001 From: Michael Zhang Date: Mon, 6 Mar 2017 00:26:11 -0800 Subject: [PATCH 03/14] Grader can't be dependent. --- qrt/grader.py | 324 ++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 316 insertions(+), 8 deletions(-) diff --git a/qrt/grader.py b/qrt/grader.py index f0acc68..0c8728b 100644 --- a/qrt/grader.py +++ b/qrt/grader.py @@ -1,22 +1,330 @@ from cStringIO import StringIO -from qrt import generate +from PIL import Image, ImageDraw +from math import ceil, sqrt + +ALTCONST = sqrt(3) / 2.0 +ISIZE = 784.0 +IMARGIN = 22.0 + +def empty_hex(size): + c = 0 + points = [] + for i in range(2, size * 2 + 2, 2): + points.append([0] * i) + middle = [] + for i in range(size * 2 - 1): + row = [0] * (size * 2) + middle.append(row) + epoints = list(row[:] for row in points[::-1]) + return points + middle + epoints + +def intify(points): + return map(lambda c: (int(c[0]), int(c[1])), points) + +def draw_triangle(im, points, cell, size): + draw = ImageDraw.Draw(im) + # draw.polygon(points, outline=(0, 0, 0)) + if cell: + draw.polygon(intify(points), fill=(0, 0, 0)) + return im + +def getsection(i, size): + return 0 if i <= size - 1 else (1 if i < 3 * size - 1 else 2) + +def getspace(size): + return max(0, sum(len(filter(lambda a: a == 0, b)) for b in empty_hex(size)) - 2) + +def generate_image(string, debug=False): + size = 0 + binstring = bin(int(string.encode("hex"), 16)).strip("0b") + while size < 2 or getspace(size + 1) < len(binstring): + size += 1 + n = getspace(size) + # print size, len(binstring) + if debug: print "SIZE", size, " n =", n + im = Image.new("RGB", (int(ISIZE), int(ISIZE)), "white") + pattern = empty_hex(size) + # print len(binstring) + # print sum(len(i) for i in pattern) + pattern[0][len(string) % 2] = 1 + curr = (1, 1 + len(string) % 2, 3 - len(string) % 2) + # 0 1 + # 3 2 + for c in range(n): # range(len(binstring)): + i, j, d = curr + row = pattern[i] + if c < len(binstring): + b = int(binstring[c]) + pattern[i][j] = b + if c % 2 == 0: + pattern[i][j] ^= 1 + + section = getsection(i, size) + leftfacing = [j % 2 == 0, j % 2 != (i - size) % 2, j % 2 == 0][section] + if debug: print "c =", c, ", i =", i, ", j =", j, ", d =", d, ", s =", section, ", l =", leftfacing + if section == 0: + if getsection(i + 1, size) == 0: + if leftfacing: + if d == 0: + if j == 0: + curr = i + 1, j, (d + 2) % 4 + else: + curr = i - 1, j - 1, d + elif d == 1 or d == 2: + curr = i, j + 1, d + elif d == 3: + curr = i + 1, j + 1, d + else: + if d == 0: + curr = i, j - 1, d + elif d == 1: + if j == len(row) - 1: + curr = i + 1, j + 2, (d + 2) % 4 + else: + curr = i - 1, j - 1, d + elif d == 2: + curr = i + 1, j + 1, d + elif d == 3: + curr = i, j - 1, d + elif getsection(i + 1, size) == 1: + if leftfacing: + if d == 0: + if j == 0: + curr = i + 1, j, (d + 2) % 4 + else: + curr = i - 1, j - 1, d + elif d == 1 or d == 2: + curr = i, j + 1, d + elif d == 3: + curr = i + 1, j, d + else: + if d == 0: + curr = i, j - 1, d + elif d == 1: + if j == len(row) - 1: + curr = i + 1, j, (d + 2) % 4 + else: + curr = i - 1, j - 1, d + elif d == 2: + curr = i + 1, j, d + elif d == 3: + curr = i, j - 1, d + elif section == 1: + if getsection(i - 1, size) == 0: + if leftfacing: + if j == len(row) - 1: + if d == 1: + curr = i + 2, j, (d + 2) % 4 + elif d == 2: + curr = i + 2, j, (d + 2) % 4 + elif d == 3: + curr = i + 1, j, d + else: + if d == 0: + curr = i - 1, j, d + elif d == 1 or d == 2: + curr = i, j + 1, d + elif d == 3: + curr = i + 1, j, d + else: + if j == 0: + if d == 0: + curr = i + 2, j, (d + 2) % 4 + elif d == 2: + curr = i + 1, j, d + elif d == 3: + curr = i + 2, j, (d + 2) % 4 + else: + if d == 0 or d == 3: + curr = i, j - 1, d + elif d == 1: + curr = i - 1, j, d + elif d == 2: + curr = i + 1, j, d + elif getsection(i - 1, size) == 1: + if getsection(i + 1, size) == 1: + if leftfacing: + if j == len(row) - 1: + if d == 0: + curr = i - 1, j, d + elif d == 1: + curr = i + 2, j, (d + 2) % 4 + elif d == 2: + curr = i + 2, j, (d + 2) % 4 + elif d == 3: + curr = i + 1, j, d + else: + if d == 0: + curr = i - 1, j, d + elif d == 1 or d == 2: + curr = i, j + 1, d + elif d == 3: + curr = i + 1, j, d + else: + if j == 0: + if d == 0: + curr = i + 2, j, (d + 2) % 4 + elif d == 1: + curr = i - 1, j, d + elif d == 2: + curr = i + 1, j, d + elif d == 3: + curr = i + 2, j, (d + 2) % 4 + else: + if d == 0 or d == 3: + curr = i, j - 1, d + elif d == 1: + curr = i - 1, j, d + elif d == 2: + curr = i + 1, j, d + elif getsection(i + 1, size) == 2: + if leftfacing: + if j == len(row) - 1: + if d == 0: + curr = i - 1, j, d + elif d == 2: + curr = i + 1, j, (d + 2) % 4 + else: + if d == 0: + curr = i - 1, j, d + elif d == 1: + curr = i, j + 1, d + elif d == 2: + curr = i, j + 1, d + elif d == 3: + curr = i + 1, j, d + else: + if d == 0: + curr = i, j - 1, d + elif d == 1: + curr = i - 1, j, d + elif d == 2: + curr = i + 1, j, d + elif d == 3: + if j == 0: + curr = i + 1, j, (d + 2) % 4 + else: + curr = i, j - 1, d + elif section == 2: + if getsection(i - 1, size) == 1: + if leftfacing: + if d == 0: + curr = i - 1, j, d + elif d == 1: + curr = i, j + 1, d + elif d == 2: + curr = i, j + 1, d + elif d == 3: + if j == 0: + curr = i + 1, j, (d + 2) % 4 + else: + curr = i + 1, j - 1, d + else: + if d == 0 or d == 3: + curr = i, j - 1, d + elif d == 1: + curr = i - 1, j, d + elif d == 2: + if j == len(row) - 1: + curr = i + 1, j - 2, (d + 2) % 4 + else: + curr = i + 1, j - 1, d + elif getsection(i - 1, size) == 2: + if leftfacing: + if d == 0: + curr = i - 1, j + 1, d + elif d == 1 or d == 2: + curr = i, j + 1, d + elif d == 3: + if j == 0: + curr = i + 1, j, (d + 2) % 4 + else: + curr = i + 1, j - 1, d + else: + if j == len(row) - 1: + if d == 0: + curr = i, j - 1, d + elif d == 1: + curr = i - 1, j + 1, d + elif d == 2: + curr = i + 1, j - 2, (d + 2) % 4 + else: + if d == 0 or d == 3: + curr = i, j - 1, d + elif d == 1: + curr = i - 1, j + 1, d + elif d == 2: + curr = i + 1, j - 1, d + # for i in range(len(pattern)): + # for j in range(len(pattern[i])): + # section = 0 if i <= size - 1 else (1 if i < 3 * size - 1 else 2) + # leftfacing = [j % 2 == 0, j % 2 != (i - size) % 2, j % 2 == 0][section] + # if not leftfacing: + # print j, + # print + sidelen = (ISIZE - IMARGIN * 2) / (2.0 * size) + altitude = sidelen * ALTCONST + # print sidelen, altitude + for i in range(len(pattern)): + section = getsection(i, size) + row = pattern[i] + rowleft = (ISIZE / 2) - (altitude * len(row) / 2) + if section % 2 == 0: + evenrow = i % 2 == 0 + for j in range(len(row)): + cell = row[j] + top = ceil(i / 2.0) * sidelen - (0.5 * sidelen if not evenrow else 0) + IMARGIN + bottom = top + sidelen + if j % 2 == 0: + points = [ + (rowleft + altitude * j, top + sidelen / 2), + (rowleft + altitude * (j + 1), top), (rowleft + altitude * (j + 1), bottom) + ] + else: + points = [ + (rowleft + altitude * (j + 1), top + sidelen / 2), + (rowleft + altitude * j, top), (rowleft + altitude * j, bottom) + ] + draw_triangle(im, points, cell, size) + else: + evenrow = (i - size) % 2 == 1 + for j in range(len(row)): + cell = row[j] + top = ceil(i / 2.0) * sidelen - (0.5 * sidelen if i % 2 == 1 else 0) + IMARGIN + bottom = top + sidelen + if j % 2 == (i - size) % 2: + points = [ + (rowleft + altitude * (j + 1), top + sidelen / 2), + (rowleft + altitude * j, top), (rowleft + altitude * j, bottom) + ] + else: + points = [ + (rowleft + altitude * j, top + sidelen / 2), + (rowleft + altitude * (j + 1), top), (rowleft + altitude * (j + 1), bottom) + ] + draw_triangle(im, points, cell, size) + return im FLAG = "are_triangles_more_secure_than_squares?_%s}" def get_salt(random): - return "".join([random.choice("0123456789abcdef") for i in range(8)]) + salt = "".join([random.choice("0123456789abcdef") for i in range(8)]) + return salt + +def generate_flag(random): + salt = get_salt(random) + im = generate_image("easyctf{%s}" % (FLAG % salt)) + flag = StringIO() + im.save(flag, format="PNG") + return flag def generate(random): - salt = get_salt(random) - im = generate("easyctf{%s}" % (FLAG % salt)) - flag = StringIO() - im.save(buf, format="PNG") return dict(files={ - "flag.png": flag + "flag.png": generate_flag }) def grade(random, key): salt = get_salt(random) if key.find(FLAG % salt) >= 0: return True, "Correct!" - return False, "Nope." \ No newline at end of file + return False, "Nope." From 38f362252588cdc0c7ea1a2da0e58344a67173be Mon Sep 17 00:00:00 2001 From: Michael Zhang Date: Tue, 7 Mar 2017 16:04:58 -0600 Subject: [PATCH 04/14] Update --- count.py | 5 ++++- decode-me/problem.yml | 2 +- listen-closely/problem.yml | 2 +- luckyguess/problem.yml | 2 +- phunkypython1/problem.yml | 4 ++-- phunkypython2/problem.yml | 4 ++-- qrt/problem.yml | 4 ++-- wayward-space-junk/solution.txt | 4 ++++ 8 files changed, 17 insertions(+), 10 deletions(-) create mode 100644 wayward-space-junk/solution.txt diff --git a/count.py b/count.py index bf76c05..a149b8f 100644 --- a/count.py +++ b/count.py @@ -24,10 +24,13 @@ problems.sort(key=lambda p: p.get("value"), reverse=True) print "Grand Total: %d" % len(problems) print "Category Breakdown:" +maxtitle = max(map(lambda p: len(p.get("title")), problems)) + 3 +maxauthor = max(map(lambda p: len(p.get("author")), problems)) + 3 + c = Counter(map(lambda p: p.get("category", ""), problems)) categories = sorted(c.items(), key=lambda c: c[1], reverse=True) for category, count in categories: print " %s: %s" % (category, count) for problem in problems: if problem.get("category") != category: continue - print " %s [%s]" % (problem.get("title"), problem.get("value")) + print " %s %s %sp" % (problem.get("title") + " " * (maxtitle - len(problem.get("title"))), problem.get("author") + " " * (maxauthor - len(problem.get("author"))), problem.get("value")) diff --git a/decode-me/problem.yml b/decode-me/problem.yml index d1ac42b..58059a7 100644 --- a/decode-me/problem.yml +++ b/decode-me/problem.yml @@ -1,7 +1,7 @@ title: Decode Me author: dududum561 hint: Simple decoding :) -category: Forensics +category: Cryptography autogen: false programming: false value: 100 diff --git a/listen-closely/problem.yml b/listen-closely/problem.yml index d25404f..cd18e72 100644 --- a/listen-closely/problem.yml +++ b/listen-closely/problem.yml @@ -1,7 +1,7 @@ author: GenericNickname title: Listen Closely hint: 1, 16, 8000 -category: Crytpography +category: Cryptography autogen: false programming: false value: 50 diff --git a/luckyguess/problem.yml b/luckyguess/problem.yml index 741186c..682babe 100644 --- a/luckyguess/problem.yml +++ b/luckyguess/problem.yml @@ -1,6 +1,6 @@ author: blockingthesky title: Lucky Guess -category: Reversing +category: Reverse Engineering autogen: false programming: false value: 200 diff --git a/phunkypython1/problem.yml b/phunkypython1/problem.yml index 449ec04..2f3722b 100644 --- a/phunkypython1/problem.yml +++ b/phunkypython1/problem.yml @@ -1,6 +1,6 @@ author: blockingthesky title: Phunky Python I -category: Reversing +category: Reverse Engineering autogen: true programming: false -value: 30 \ No newline at end of file +value: 30 diff --git a/phunkypython2/problem.yml b/phunkypython2/problem.yml index 1095691..7e88f3b 100644 --- a/phunkypython2/problem.yml +++ b/phunkypython2/problem.yml @@ -1,6 +1,6 @@ author: blockingthesky title: Phunky Python II -category: Reversing +category: Reverse Engineering autogen: true programming: false -value: 115 \ No newline at end of file +value: 115 diff --git a/qrt/problem.yml b/qrt/problem.yml index 35df231..1851c8f 100644 --- a/qrt/problem.yml +++ b/qrt/problem.yml @@ -1,5 +1,5 @@ title: Hex QR -category: Programming +category: Reverse Engineering value: 200 author: mzhang -autogen: true \ No newline at end of file +autogen: true diff --git a/wayward-space-junk/solution.txt b/wayward-space-junk/solution.txt new file mode 100644 index 0000000..bee1d74 --- /dev/null +++ b/wayward-space-junk/solution.txt @@ -0,0 +1,4 @@ +In reality, the space junk will be following a very predictable orbit, around +a polar function, which means that it will eventually be repeating as well. +The trick is to just shoot a bunch of test ones and see how far off you miss. +The pilot key simply identifies the team so they can enter the correct flag. From 98e4209e3968063024380b8934faf4239bd5cdbb Mon Sep 17 00:00:00 2001 From: Michael Zhang Date: Tue, 7 Mar 2017 18:33:17 -0600 Subject: [PATCH 05/14] Update qrt. --- qrt/grader.py | 2 +- qrt/qrt.py | 2 +- qrt/qrt.pyc | Bin 8304 -> 0 bytes 3 files changed, 2 insertions(+), 2 deletions(-) delete mode 100644 qrt/qrt.pyc diff --git a/qrt/grader.py b/qrt/grader.py index 0c8728b..0ff92c3 100644 --- a/qrt/grader.py +++ b/qrt/grader.py @@ -305,7 +305,7 @@ def generate_image(string, debug=False): draw_triangle(im, points, cell, size) return im -FLAG = "are_triangles_more_secure_than_squares?_%s}" +FLAG = "are_triangles_more_secure_than_squares?_%s" def get_salt(random): salt = "".join([random.choice("0123456789abcdef") for i in range(8)]) diff --git a/qrt/qrt.py b/qrt/qrt.py index d72640e..4175d36 100644 --- a/qrt/qrt.py +++ b/qrt/qrt.py @@ -36,7 +36,7 @@ def getspace(size): def generate(string, debug=False): size = 0 binstring = bin(int(string.encode("hex"), 16)).strip("0b") - while size < 2 or getspace(size + 1) < len(binstring): + while size < 3 or getspace(size + 1) - 8 < len(binstring): size += 1 n = getspace(size) # print size, len(binstring) diff --git a/qrt/qrt.pyc b/qrt/qrt.pyc deleted file mode 100644 index 02316a0bdc10cdf86b9e4a0650bc07903982a15d..0000000000000000000000000000000000000000 GIT binary patch literal 0 HcmV?d00001 literal 8304 zcmb_hTWlOx89uW&+v~M=oou}8G)a?QR98*yRE46Vq*s@%rPfsIwyE5Pu-O?q>+Hq5 zGj1HZD^;XLm5Pw6qKa0~rwSgpyc87)!3*L6iH9P1qN*woLa2f#K&k|Y@_qk5J3E^l zrxmfiXXeZ~|K}ft)cGj%U=K!(xG5+R>+DqcH z+^B3g-bBB))Tvz5&IFpOPOa{-;OYwd(nbQ(s(aRks^X({mRe>$EnVDk@IJy;Swq7q>dCb9JZT zE+QZ-3tN|52JhsC({y&WI`_;_Bz2|yNK>Iix>IQ)(zL6xwdFKz32eRQdh-mLhPn0? 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files: - qr.bmp \ No newline at end of file From 5320f9a77e6fcccc9337cedb3557950c077ff570 Mon Sep 17 00:00:00 2001 From: Brandon John Date: Wed, 8 Mar 2017 10:32:56 -0600 Subject: [PATCH 07/14] Added qr-1 --- qr-1/description.md | 2 ++ qr-1/grader.py | 4 ++++ qr-1/problem.yml | 9 +++++++++ qr-1/qr1.bmp | Bin 0 -> 480054 bytes 4 files changed, 15 insertions(+) create mode 100644 qr-1/description.md create mode 100644 qr-1/grader.py create mode 100644 qr-1/problem.yml create mode 100644 qr-1/qr1.bmp diff --git a/qr-1/description.md b/qr-1/description.md new file mode 100644 index 0000000..6db579b --- /dev/null +++ b/qr-1/description.md @@ -0,0 +1,2 @@ +I just saw this QR code the other day, but couldn't tell what data it has. Can you help? +[Here](${qr1_bmp}) it is. \ No newline at end of file diff --git a/qr-1/grader.py b/qr-1/grader.py new file mode 100644 index 0000000..1348b0f --- /dev/null +++ b/qr-1/grader.py @@ -0,0 +1,4 @@ +def grade(autogen, answer): + if answer.find("n0w_who-w0u1d_do_thAT_to_Th3ir_QR?") != -1: + return True, "Congrats!" + return False, "Nope, try again." \ No newline at end of file diff --git a/qr-1/problem.yml b/qr-1/problem.yml new file mode 100644 index 0000000..f0a64e7 --- /dev/null +++ b/qr-1/problem.yml @@ -0,0 +1,9 @@ +title: QR 1 +author: wiresboy +category: Forensics +autogen: false +programming: false +value: 100 +hint: Is the image only black and white? +files: + - qr1.bmp \ No newline at end of file diff --git a/qr-1/qr1.bmp b/qr-1/qr1.bmp new file mode 100644 index 0000000000000000000000000000000000000000..f43285c174bdb076896238beef0a5bd3deb69a9e GIT binary patch literal 480054 zcmeI&O|ERqk(^PorJmXvf<{mSP+u)gOoP(6C`D-l34+YCBA?s!vwzYbK;YK-(#*{* zVn?g~$N&6~|Mg$~_MiX#$NJxYU;q2xe?R{B_rLwO|NQgc{cYPrh#c-8kh#AfoWhGmcYPrh#c- z8kh#AfoWhGmcYPrh#c-8kh#AfoWhGmcYP zrh#c-8kh#AfoWhGmcYPrh#c-8kh#AfoWhGmcYPrh#c-8kh#AfoWhGmcYPrh#c-8kh#AfoWhGmcYPrh#c-8kh#AfoWhGmcYPrh#c-8kh#AfoWhGmcYPrh#c-8kh#AfoWhGmcYPrh#c-8kh#AfoWhG zmZ2Pfqy*czrXXpzy18558-EBL{1s%#ExVNXA2Wr9tz5)QFtnZv;a8z~uhu>BiTfgz=_x~<){#u%Y+*vnLm}LvBrvp| z3*lFxd9T(z@rnB)mFX!%oz{^|;cQ_-%R?dDq9ic1o(thup?R;?J@JYAB9-YWL!H)< zOyO){Ld!!T+@d5fw4Mv$SD|^Y);;lw`y!R;DMOvskxb!iVM5D8A>5)QFtnZv;a8z~ zuhu>BiTfgz=_x~<){#u%Y+*vnLm}LvBrvp|3*lFxd9T(z@rnB)mFX!%oz{^|;cQ_- z%R?dDq9ic1o(thuA-q@qe`h*{BJDzsR6bT;q%tk%Swas@oIA8mo6wH5ThAmgwA;D! zgVg|D0Du0cP^6vr>h&#L?P9-z{qcXCvgse+;xIgAm)i}+3vkMdG;M_0RquV8=tAE#{k$G12PPub;mL-7Kf z@*;UC($0JJ`i`!4317kf_&-kB^p9_G7@o4r?S|q7@Y8V$McR3~g!Icme!$oI;Uy z-mBMlbhS(P3iikUamuEDe2c^IlwEE&6feLjFOr8M?Yvj7@91im@D=Qj|KpTR|M(V% z;VHY^ZYW*=KOLt~q@DNb^&MU9625}{@qe7M=^x+XFg#_K+YQAF;1>zP1SLbQ#WnM( zLD+{*iR7WCsG=-fo{1Kbj64*y$rcm84dHF^=MQ0mlA+e(F8R_ewS@=#M$Q5G)G zM2kp99tzrIi;3Tc@V5B#hcH3OP-}6QeCQDNp;IDxs41!_3zui2MI<8+1#Pm$#BW1* zTm1P$n4n~+wYW<@bO`&d&;cfBf4`G6mq1NIq`OqQkL#IUYP*YS<7B0_3 zi%3Qu3fg3giQk6sw)pdhFhR*sYjKx+=n!s^oy*j7VQZl&Y>k?1*HAb+QbNl^Aza9j zptbN}6mN?^e+Uzl47Ij=;t+08({1rw47Jb{wnk01Ybcx@DWT<|5H93M&|3H~inqm| zKZFTNhFV)baR|4l>9%+-hFWL}Tcal1H5AT{l+f}}2p4iBXf1pg#oOY~AHoDBL#-{J zID}i&bXzaW@wWK$hcH3OP;1L44&fFx-4@TqPzz0AYt&@B zhQisA5?US#;X;lCt%VPxcw7AWLztjssI}!2hj5FUZj0w)sD-AmHEOb5L*eX52`vwW za3M#6*20HTyeTGjgqDXwxR4`3YvIEv z-WGrU5GE)YYHj(%A>5*-+v2$xYN07?jhbxNP&hkMLd!!TT*#52weVpSZ;L;F2osbH zwYGfX5N=V^ZSh-$iq<*VX}wzU@2wh6`11UXW2(>kd(4??aiEuZkzy)>=^8CKN*x(Dx_savx4 zdniuLpFe~NN`_kN`%tFktKx~awHDO23B}L^IZ|@dIXxki9*R@*=MQ0mlA+f6 zK9p(ss(7Mptp&AhLNPQ!j+ETA4z1Igx+QDBhvL-y`JY0Ob|FXdeQ2Uh7pW<&ZJTzn zts~(+_%b9EL!H*tJq$e>K>5j;HffP|ArJL!X`)TntSPN+n|86SBjG;yG9(m3oz~Pn z3_Th^`N^3!X_0mz5A|(nqD|MVDXndrcCoD^;Xe2>BosrP*3>-=JsLpy$(c53k#->u z^=)aQP1md`t!u6hocX)IAJ68bJBUnKo&Wb|DY-ZE2!S*Q_b6ZJTzn zts~(+_%b9EL!H*tJq$e>K>5j;HffP|ArJL!X`)TntSPN+n|86SBjG;yG9(m3oz~Pn z3_Th^`N^3!X_0mz5A|(nqD|MVDXndrcCoD^;Xe2>BosrP*3>-=JsLpy$(c53k#->u z^=)aQP1md`t!u6hocX)IAJ68bJBUnKo&Wb|DY-ZE2!S*Q_b6ZJTzn zts~(+_%b9EL!H*tJq$e>K>5j;HffP|ArJL!X`)TntSPN+n|86SBjG;yG9(m3oz~Pn z3_Th^`L{#9giR;zO9<*b5N;8it%a};Ig%-^s4oMA3zfA_o6x@g@8#@+yBGB}YdV+m zC3K#$?GnP-wh;CqM>56z^ksl>p|aL#6WZ7Ry_|h;_oBXLP3Ka+gw9j8T|zk97Q#N{ zNT#@-z6=m9RMt9eLi_r^m$MJ0HW}(0R(XO9*G%LfD5K$rSg~mjS|s%37yQ zXkY*La`wU9i~5>1olE%=I#1bl3E^y82>XyDnc{x>GC;UcS?jb3?d$(u&OW$%QD3vB zb17d!=PBDRA)IXsVIOiNQ`}Eq1_&1_Yn?Wsef{6d*#~zo>TA|?F6B$;JZ0M@gtKiS z>_d)Ziu>uy0O3Mqt#~&bEcH4>^)4?x!yUgbS6mPMgra{_o}NgS!{? zHETMT@+EYhvh5PW*|re&AxARB{q$vkaG|o+X%pJl|Gk`jG*6<*Z7FNZm%$TlYc1%# zY}X=qcKWU^hPuFnmQO7idO>a9v0lv?C*Ft3C+Q ztp&Z8?OFs+N8k0sP#2ic@~I_5FR1N1)~h+=#QRYB#2v}D)`H&4b}fRZqwo4*s0&PJ z`P7o37u5D0>(!ib;(e%m;*MlnYeDa2yB5LI(RckY)CDHAd}_(i3u^n0^=i&I@jg^O zaYwSPwV?O1U5nu9=(~Ox>H-s5KDA`%1+{(0dNpU9cpoaCxFgxtTF`shu0`;4^j$v; 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For some reason, some of the images are not scannable. [Here](${qr_bmp}) is one, can you tell me what it says? \ No newline at end of file +When I am not practicing my [Oboe](https://en.wikipedia.org/wiki/Oboe) for band, I have been working on a QR code generator. For some reason, some of the images are not scannable. [Here](${qr2_bmp}) is one, can you tell me what it says? \ No newline at end of file diff --git a/qr-2/problem.yml b/qr-2/problem.yml index 8436350..597ffd3 100644 --- a/qr-2/problem.yml +++ b/qr-2/problem.yml @@ -6,4 +6,4 @@ programming: false value: 330 hint: Is there another kind of Oboe? files: - - qr.bmp \ No newline at end of file + - qr2.bmp \ No newline at end of file diff --git a/qr-2/qr.bmp b/qr-2/qr2.bmp similarity index 100% rename from qr-2/qr.bmp rename to qr-2/qr2.bmp From 5d2e620fc1173fbbac0aa98a4d35602b4389dbe0 Mon Sep 17 00:00:00 2001 From: Brandon John Date: Wed, 8 Mar 2017 15:24:44 -0600 Subject: [PATCH 09/14] Added fizz-buzz-2's source grader --- fizz-buzz-2/source_grader.py | 5 +++++ 1 file changed, 5 insertions(+) create mode 100644 fizz-buzz-2/source_grader.py diff --git a/fizz-buzz-2/source_grader.py b/fizz-buzz-2/source_grader.py new file mode 100644 index 0000000..ebd2523 --- /dev/null +++ b/fizz-buzz-2/source_grader.py @@ -0,0 +1,5 @@ +code = raw_input() +if ("i" in code) or ("I" in code) or ("?" in code): + print "Your program contains an 'i', 'I', or '?'. Please remove it and try again." +else + print "OK" \ No newline at end of file From b755f8e6f723ea82fe0c10b0ae45eb5839315bc8 Mon Sep 17 00:00:00 2001 From: John Date: Thu, 9 Mar 2017 02:52:33 -0600 Subject: [PATCH 10/14] count.py now works in py3 and py2 Figured compatibility is good --- count.py | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/count.py b/count.py index a149b8f..60f1ed1 100644 --- a/count.py +++ b/count.py @@ -21,8 +21,8 @@ for problem_name in problem_names: # print traceback.format_exc() problems.sort(key=lambda p: p.get("value"), reverse=True) -print "Grand Total: %d" % len(problems) -print "Category Breakdown:" +print("Grand Total: %d" % len(problems)) +print("Category Breakdown:") maxtitle = max(map(lambda p: len(p.get("title")), problems)) + 3 maxauthor = max(map(lambda p: len(p.get("author")), problems)) + 3 @@ -30,7 +30,7 @@ maxauthor = max(map(lambda p: len(p.get("author")), problems)) + 3 c = Counter(map(lambda p: p.get("category", ""), problems)) categories = sorted(c.items(), key=lambda c: c[1], reverse=True) for category, count in categories: - print " %s: %s" % (category, count) + print(" %s: %s" % (category, count)) for problem in problems: if problem.get("category") != category: continue - print " %s %s %sp" % (problem.get("title") + " " * (maxtitle - len(problem.get("title"))), problem.get("author") + " " * (maxauthor - len(problem.get("author"))), problem.get("value")) + print(" %s %s %sp" % (problem.get("title") + " " * (maxtitle - len(problem.get("title"))), problem.get("author") + " " * (maxauthor - len(problem.get("author"))), problem.get("value"))) From 7c970f316f0dbcf85a5ea03ba86c5046b78d3c7f Mon Sep 17 00:00:00 2001 From: John Date: Thu, 9 Mar 2017 02:56:41 -0600 Subject: [PATCH 11/14] Added a simple rop problem Needs to be built on a linux machine and the binary put in the files/description so that its easier to solve. Also needs to be put on the shell. --- simple-rop/Makefile | 2 ++ simple-rop/description.md | 3 +++ simple-rop/flag.txt | 1 + simple-rop/grader.py | 4 ++++ simple-rop/problem.yml | 7 +++++++ simple-rop/simple-rop.c | 25 +++++++++++++++++++++++++ 6 files changed, 42 insertions(+) create mode 100644 simple-rop/Makefile create mode 100644 simple-rop/description.md create mode 100644 simple-rop/flag.txt create mode 100644 simple-rop/grader.py create mode 100644 simple-rop/problem.yml create mode 100644 simple-rop/simple-rop.c diff --git a/simple-rop/Makefile b/simple-rop/Makefile new file mode 100644 index 0000000..96f2342 --- /dev/null +++ b/simple-rop/Makefile @@ -0,0 +1,2 @@ +(all): + gcc -m32 -o simple-rop -fno-stack-protector -O0 simple-rop.c \ No newline at end of file diff --git a/simple-rop/description.md b/simple-rop/description.md new file mode 100644 index 0000000..feda140 --- /dev/null +++ b/simple-rop/description.md @@ -0,0 +1,3 @@ +On the shell there is a folder ``. +Read flag.txt +[Source](${simple-rop.c}) \ No newline at end of file diff --git a/simple-rop/flag.txt b/simple-rop/flag.txt new file mode 100644 index 0000000..43e31ae --- /dev/null +++ b/simple-rop/flag.txt @@ -0,0 +1 @@ +easyctf{r0p_7o_v1ct0ry} \ No newline at end of file diff --git a/simple-rop/grader.py b/simple-rop/grader.py new file mode 100644 index 0000000..31e162c --- /dev/null +++ b/simple-rop/grader.py @@ -0,0 +1,4 @@ +def grade(random, key): + if key.find("r0p_7o_v1ct0ry") != -1: + return True, "Correct!" + return False, "Nope." diff --git a/simple-rop/problem.yml b/simple-rop/problem.yml new file mode 100644 index 0000000..14f06a3 --- /dev/null +++ b/simple-rop/problem.yml @@ -0,0 +1,7 @@ +title: Simple Rop +category: Binary Exploitation +value: 75 +author: r3ndom +autogen: false +files: + - simple-rop.c diff --git a/simple-rop/simple-rop.c b/simple-rop/simple-rop.c new file mode 100644 index 0000000..f3c33e3 --- /dev/null +++ b/simple-rop/simple-rop.c @@ -0,0 +1,25 @@ +#include +#include + +void print_flag(); +void what_did_you_say(); + +int main(int argc, char* argv[]) +{ + gid_t gid = getegid(); + setresgid(gid, gid, gid); + what_did_you_say(); + return 0; +} + +void print_flag() +{ + system("cat flag.txt"); +} + +void what_did_you_say() +{ + char buff[64]; + gets(buff); + printf("You said: %s\n", buff); +} From 08cb80c384387a95ca9b5638ecb4d2e9c716fea6 Mon Sep 17 00:00:00 2001 From: meeees Date: Thu, 9 Mar 2017 23:24:48 -0600 Subject: [PATCH 12/14] changed category of Bizarro to forensics --- bizarro/problem.yml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/bizarro/problem.yml b/bizarro/problem.yml index eab180d..e41572d 100644 --- a/bizarro/problem.yml +++ b/bizarro/problem.yml @@ -1,6 +1,6 @@ author: blockingthesky title: Bizarro -category: Steganography +category: Forensics autogen: false programming: false value: 400 From 44146b8027370d3dbad0154e4e0b342931c3c4b2 Mon Sep 17 00:00:00 2001 From: meeees Date: Fri, 10 Mar 2017 00:17:08 -0600 Subject: [PATCH 13/14] tried to make the point values for my problems more reasonable, probably could still be tuned but w/e --- flag-peg/problem.yml | 2 +- listen-closely/problem.yml | 2 +- match-me/problem.yml | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/flag-peg/problem.yml b/flag-peg/problem.yml index 13c6e47..1080de2 100644 --- a/flag-peg/problem.yml +++ b/flag-peg/problem.yml @@ -4,6 +4,6 @@ hint: You're not looking deep enough category: Forensics autogen: false programming: false -value: 50 +value: 150 files: - heresaflag.jpg diff --git a/listen-closely/problem.yml b/listen-closely/problem.yml index cd18e72..051ef0d 100644 --- a/listen-closely/problem.yml +++ b/listen-closely/problem.yml @@ -4,6 +4,6 @@ hint: 1, 16, 8000 category: Cryptography autogen: false programming: false -value: 50 +value: 300 files: - listenclosely.wav diff --git a/match-me/problem.yml b/match-me/problem.yml index f5608f7..bf9854d 100644 --- a/match-me/problem.yml +++ b/match-me/problem.yml @@ -4,7 +4,7 @@ hint: This is a fairly well-known graph problem, there's probably some sort of i category: Algorithms autogen: false programming: false -value: 50 +value: 400 files: - female_prefs.txt - male_prefs.txt From 93577ddee37a489cf0aa1a4b987d23a3bc3d2657 Mon Sep 17 00:00:00 2001 From: Jacob Magnuson Date: Fri, 10 Mar 2017 23:21:07 +0000 Subject: [PATCH 14/14] removed dijkstra --- dijkstra/description.md | 22 -------- dijkstra/dijkstra_map.svg | 108 -------------------------------------- dijkstra/grader.py | 4 -- dijkstra/problem.yml | 9 ---- rsa1/description.md | 1 + rsa1/grader.py | 4 ++ rsa1/problem.yml | 9 ++++ rsa1/rsa3 | 2 + 8 files changed, 16 insertions(+), 143 deletions(-) delete mode 100644 dijkstra/description.md delete mode 100644 dijkstra/dijkstra_map.svg delete mode 100644 dijkstra/grader.py delete mode 100644 dijkstra/problem.yml create mode 100644 rsa1/description.md create mode 100644 rsa1/grader.py create mode 100644 rsa1/problem.yml create mode 100644 rsa1/rsa3 diff --git a/dijkstra/description.md b/dijkstra/description.md deleted file mode 100644 index 80240a6..0000000 --- a/dijkstra/description.md +++ /dev/null @@ -1,22 +0,0 @@ -This is a high-level programming challenge. Given a set of vertices corresponding to the map below, your program must output the shortest path from `a` to `z`. - -![image](${dijkstra_map_svg}) - -The length of the line segments is randomized such that the length (`l`) satisfies `20 <= l <= 120`. - -Input will consist of 49 lines in the format `vertex1 vertex2 distanceBetween` - -Here are a few lines of example input: -```shell -h i 94 -h o 40 -i l 95 -l k 65 -l t 63 -t u 47 -``` - -The output should be written to a file named "dijkstra.out" in the current directory. Output will consist of the entire path, with `->` in between vertices. Print the current distance traveled in parenthesis after each vertex, as shown below. -``` -a -> b(113) -> c(210) -> f(262) -> h(291) -> i(326) -> m(381) -> s(409) -> x(444) -> y(534) -> z(557) -``` \ No newline at end of file diff --git a/dijkstra/dijkstra_map.svg b/dijkstra/dijkstra_map.svg deleted file mode 100644 index 5cc8600..0000000 --- a/dijkstra/dijkstra_map.svg +++ /dev/null @@ -1,108 +0,0 @@ - - - - - - - - - - - - - -A -B -E -C -D -F -J -K -L - - - - -M -I -H -G - - - - - - - - - - - - -P -Q -R -X -Y -Z -V -U - -T -S -N -O -W - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Start: ATarget: Z - diff --git a/dijkstra/grader.py b/dijkstra/grader.py deleted file mode 100644 index edf74d0..0000000 --- a/dijkstra/grader.py +++ /dev/null @@ -1,4 +0,0 @@ -def grade(autogen, answer): - if answer.find("edsger_wybe_dijkstra_was_a_happy_accident") != -1: - return True, "Great Job! That's a tough one." - return False, "Nope, try again." \ No newline at end of file diff --git a/dijkstra/problem.yml b/dijkstra/problem.yml deleted file mode 100644 index b6292db..0000000 --- a/dijkstra/problem.yml +++ /dev/null @@ -1,9 +0,0 @@ -title: Dijkstra -author: ztaylor54 -hint: You might consider reading up on shortest-path algorithms. -category: Programming -autogen: false -programming: false -value: 450 -files: - - dijkstra_map.svg \ No newline at end of file diff --git a/rsa1/description.md b/rsa1/description.md new file mode 100644 index 0000000..6f6a960 --- /dev/null +++ b/rsa1/description.md @@ -0,0 +1 @@ +We came across another [message]($rsa3) that follows the same cryptographic schema as those other Really Scary Admin messages. Take a look and see if you can crack it. \ No newline at end of file diff --git a/rsa1/grader.py b/rsa1/grader.py new file mode 100644 index 0000000..e9ca30f --- /dev/null +++ b/rsa1/grader.py @@ -0,0 +1,4 @@ +def grade(autogen, key): + if key.find("tw0_v3ry_merrry_tw1n_pr1m35!!_417c0d") != -1: + return True, "Really Superb! Applause!" + return False, "RIP" diff --git a/rsa1/problem.yml b/rsa1/problem.yml new file mode 100644 index 0000000..c38e4f0 --- /dev/null +++ b/rsa1/problem.yml @@ -0,0 +1,9 @@ +author: blockingthesky +title: RSA 3 +hint: You might want to read up on how RSA works. +category: Cryptography +autogen: false +programming: false +value: 70 +files: + - rsa3 diff --git a/rsa1/rsa3 b/rsa1/rsa3 new file mode 100644 index 0000000..bda7c13 --- /dev/null +++ b/rsa1/rsa3 @@ -0,0 +1,2 @@ +{N : e : c} +{0x27335d21ca51432fa000ddf9e81f630314a0ef2e35d81a839584c5a7356b94934630ebfc2ef9c55b111e8c373f2db66ca3be0c0818b1d4eda7d53c1bd0067f66a12897099b5e322d85a8da45b72b828813af23L : 0x10001 : 0x9b9c138e0d473b6e6cf44acfa3becb358b91d0ba9bfb37bf11effcebf9e0fe4a86439e8217819c273ea5c1c5acfd70147533aa550aa70f2e07cc98be1a1b0ea36c0738d1c994c50b1bd633e3873fc0cb377e7L} \ No newline at end of file